Electrical noise generation circuits for use in conjunction with

Details Electrical noise generation circuits for use in conjunction with Electrical noise generation circuits for use in conjunction with

1997-03-06

1999-01-19

Hofsass, Jeffery A.

Communications: electrical

Audible indication

Simulation

3403841, 3403847, 472 64, 126500, 431125, G08B 310

Patent

active

058617981

ABSTRACT:
An electrical noise generation circuit for use in conjunction with an electro-acoustic transducer to simulate the sound of burning wood. A small loudspeaker enclosure accommodates a battery driven circuit in which a wideband electrical noise signal is produced by current flow through a zener diode. The noise signal is amplified by a frequency selective amplifier designed to have a high gain at a selected frequency in the audio frequency range, and rectified to produce unipolar signals which have randomly variable amplitudes and occur at random intervals. The unipolar signals are amplified by an amplifier having an adjustable input threshold bias. By adjustment of the bias level, output signals from the amplifier, and sounds produced by the loudspeaker, may be varied from intermittent individual pulses to rapid "bursts" of pulses. Operation of the circuit in proximity to an artificial log fire produces a surprisingly realistic audible simulation of wood burning sounds.

REFERENCES:
patent: 2974424 (1961-03-01), Roberts
patent: 3571484 (1971-03-01), Hirose
patent: 3795873 (1974-03-01), Fein et al.
patent: 4060701 (1977-11-01), Epley
patent: 4481852 (1984-11-01), Makuta et al.
patent: 5131044 (1992-07-01), Brown, Sr. et al.
patent: 5594802 (1997-01-01), Berghoff et al.
patent: 5635898 (1997-06-01), Walters et al.

Affiliated with

Also associated with

Rating

Electrical noise generation circuits for use in conjunction with does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrical noise generation circuits for use in conjunction with, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrical noise generation circuits for use in conjunction with will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1249883